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Biochemistry 2

Total questions: 60

Worksheet time: 32mins

Name
Class
Date
1.

___ test indicates the absence of monosaccharides

a)

Barfoed's

b)

Fehling's

c)

Molisch's

d)

Selivanoff's

2.

In Benedict's test ___ colour precipitate was obtained with reducing sugars

a)

Violet

b)

Red

c)

Orange

d)

Purple

3.

In Selivanoff's test, if their is no characteristic change it indicates the

a)

Absence of ketose sugar

b)

Presence of ketose sugar

c)

Absence of monosaccaride

d)

Presence of monosaccaride

4.

In Molisch's test, (test solution + Molisch's reagent + ____) is added

a)

Con. Sulphuric acid

b)

Dil. Sulphuric acid

c)

Con. Hydrochloric acid

d)

Dil. Hydrochloric acid

5.

Maltose is a ___

a)

Monosaccharide

b)

Disaccharide

c)

Polysaccharide

d)

None of these

6.

In Molisch's test, violet ring indicates the presence of

a)

Ketose sugar

b)

Carbohydrate

c)

Reducing sugar

d)

Monosaccharide

7.

___ test is used to identify reducing sugar

a)

Barfoed's

b)

Fehling's

c)

Selivanoff's

d)

Osazone

8.

Which test would indicate the present or absence of starch in a sample?

a)

Barium Chloride Test

b)

Biuret Solution Test

c)

Iodine Test

d)

Glucose Test

9.

Which among the following carbohydrates will give blue color at the end of Benedict's test?

a)

Glucose

b)

Galactose

c)

Lactose

d)

Sucrose

10.

Which is a non-reducing sugar?

a)

Maltose

b)

Sucrose

c)

Lactose

d)

None of the above

11.

Reducing sugars are differentiated from non-reducing sugars

a)

Iodine test

b)

Molisch's test

c)

Seliwanoff's test

d)

Benedict's test

12.

The general test for detection of cabohydrates is

a)

Iodine test

b)

Molisch's test

c)

Barfoed's test

d)

Osazone test

13.

Olive oil is tested with iodine.

What result is to be expected?

a)

Iodine turns from yellow to dark blue

b)

Iodine turns from dark blue to yellow

c)

Iodine turns from yellow to purple

d)

Iodine remains yellow

14.

What is the reagent to test for reducing sugars?

a)

Bial's reagent

b)

Iodine

c)

DNS reagent

d)

Biuret reagent

15.

Which one of the following is present in Seliwanoff's reagent?

a)

Conc Sulfuric acid

b)

Conc Nitric acid

c)

5N Hydrochloric acid

d)

Conc Hydrochloric acid

16.

The color of the positive result for Iodine test

a)

Blue - black

b)

Yellow - orange

c)

Pink

d)

Reddish-violet

17.

The following are the sugars that formed brick red precipitate during Barfoed test, EXCEPT:

a)

Sucrose

b)

Lactose

c)

Glucose

d)

Fructose

18.

This test will give blue green colored complex as the positive result for the presence of pentoses.

a)

Bial's orcinol test

b)

Fehling's Test

c)

Seliwanoff's Test

d)

Barfoed Test

19.

The study of compounds that do not contain carbon.

a)

Organic Chemistry

b)

Inorganic Chemistry

c)

Biochemistry

d)

Analytical Chemistry

20.

The study of carbon containing compounds.

a)

Organic Chemistry

b)

Inorganic Chemistry

c)

Physical Chemistry

d)

Biochemistry

21.

haemoglobin transports oxygen through the ------------

a)

FAT

b)

CARBOHYDRATE

c)

PROTEINS

d)

BLOOD

22.

žinsulin controls our blood sugar concentration by regulating the uptake of----------- into cells.

a)

galactose

b)

maltose

c)

fructose

d)

glucose

23.

ž----------- are enzymes that help you to digest carbohydrates and fat.

a)

Amylase and lipase

b)

pepsin

c)

trypsin

d)

none

24.
Glycolysis results in the net gain of:
a)
2 ATP
b)
4 ATP
c)
4 NADH
d)
2 Acetyl CoA
25.
Which of the following is not a requirement for glycolysis?
a)
Oxygen
b)
ATP
c)
NAD+
d)
Glucose
26.
What is the starting molecule for glycolysis?
a)
Glucose
b)
ADP
c)
Oxygen
d)
Pyruvic Acid
27.
Glycolysis requires
a)
ATP
b)
Oxygen
c)
sunlight
d)
NADP+
28.
Where does glycolysis occur?
a)
mitochondrial matrix
b)
cytoplasm
c)
inner membrane of mitochondria
d)
outer membrane of mitochondria
29.
The first step in getting energy in the cell by breaking down glucose is known as
a)
the Krebs cycle
b)
electron transport
c)
fermentation
d)
glycolysis
30.
Will a cell go through glycolysis even if there is no final electron acceptor for ETC?
a)
Yes
b)
No
31.
Glycolysis literally translates to:
a)
sugar-taking
b)
Glucose-making
c)
sugar-baking
d)
Glucose-breaking
32.

Which enzyme adds a phosphate to Fructose-6-phosphate?

a)
PhosphoFructoKinase
b)
Hexokinase
c)
Aldolase
d)
Pyruvate Kinase
33.
What is the function of NAD+?
a)
It absorbs light
b)
It is an electron carrier
c)
It is a light-reflecting pigment
d)
It acts as long-term energy storage
34.
In glycolysis, glucose is converted into two molecules of _____. 
a)
citric acid
b)
oxaloacetic acid
c)
pyruvic acid
d)
Acetyl CoA
35.
Which of the following is not a product of glycolysis?
a)
FADH2
b)
NADH
c)
ATP
d)
Pyruvate
36.
Glycolysis occurs during aerobic or anaerobic conditions.
a)
True
b)
False
37.
Glycolysis results in the total production of:
a)
2 ATP
b)
4 ATP
c)
4 NADH
d)
2 Acetyl CoA
38.
Where does glycolysis take place in cells?
a)
Cytoplasm
b)
Mitochondrion
c)
Endoplasmic Reticulum
d)
Ribosomes
39.
The enzyme that produces G3P & DHAP is:
a)
Hexokinase
b)
Aldolase
c)
PhosphoFructoKinase
d)
Enolase
40.

Pyruvic acid is called_________.

a)

energy

b)

enzyme

c)

protein carrier

d)

metabolic intermediate

41.
The "regenerator" of the Krebs Cycle is:
a)
Oxaloacetate
b)
Acetyl-CoA
c)
Citrate
d)
α-Ketoglutarate
42.
Before entering Krebs Cycle, pyruvate is:
a)
Oxidized
b)
Reduced
c)
Isomerized to Acetyl-CoA
d)
Phosphorylated
43.
How many FADH2 molecules are produced by 1 turn of the Krebs Cycle?
a)
1
b)
2
c)
3
d)
4
44.
How many NADH molecules are produced by a molecule of glucose through the Krebs' Cycle?
a)
2
b)
3
c)
4
d)
6
45.
Which of the following is not a requirement for the Krebs Cycle?
a)
NAD+
b)
FAD+
c)
Water
d)
Pyruvate
46.
How many CO2 molecules are produced by the Krebs Cycle for a molecule of glucose?
a)
2
b)
4
c)
6
d)
3
47.
Krebs Cycle takes place in the:
a)
Cytoplasm
b)
Matrix
c)
Ribsome
d)
InterMembrane Space
48.
Folds in the mitochondrion are called:
a)
Cristae
b)
Matrix
c)
Golgi Bodies
d)
Carbuncles
49.
Krebs Cycle is part of_______________ respiration.
a)
Aerobic
b)
Anaerobic
50.
The inner most interior of the mitochondrion is called the:
a)
Cristae
b)
Matrix
c)
Golgi Bodies
d)
Carbuncles
51.

Succinyl CoA contains how many carbons?

a)

2

b)

6

c)

5

d)

4

52.

The electron transport chain is the primary source of energy in the _______ pathway

a)

aerobic

b)

anaerobic

53.

Electron transport chain happens inside the mitochondria, specifically in the _________________

a)

matrix

b)

inner mitochondrial membrane

c)

intermembrane space

d)

outer mitochondrial membrane

54.

The "fuel" for the Kreb's cycle is

a)

CO2

b)

H2O

c)

GTP

d)

Acetyl-CoA

55.
Which of the following molecules can be broken down into acetyl and enter the citric acid cycle?
a)
Amino acids
b)
Fatty acids
c)
Pyruvate
d)
All of the above
56.
Which of the following enzyme catalyzes the first step of glycolysis?
a)
Aldolase
b)
Pyruvate kinase
c)
Hexokinase
d)
Phosphofructokinase
57.

Glucokinase is an isoenzyme of hexokinase which produced by which of the following?

a)

kidney

b)

muscle

c)

liver

d)

brain

58.
Where does glycolysis occur?
a)
Mitochondria
b)
Cytosol
c)
Inner Membrane
d)
Cristae
59.
What enzyme is responsible in the 9th reaction of glycolysis?
a)
hexokinase
b)
aldolase
c)
enolase
d)
glyceraldehyde
60.

Is these Quizezs Are helpful write your openion?

4 lines

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